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Chopping signal verification method, system and electric energy detection device

A chopping signal and sampling signal technology, which is applied in the field of chopping signal verification method, system and electric energy detection device, can solve the problems of destroying signal integrity, error of electric energy meter, and failure to obtain the effective value of voltage vector, etc., so as to ensure the basic interests , to ensure the effect of measurement accuracy

Active Publication Date: 2020-09-18
HEXING ELECTRICAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The application of a special signal communication on the power line through a small-angle chopping signal. Due to the characteristics of the small chopping angle and the power grid signal of the power line itself being easily interfered, the power line chopping communication signal is difficult to be detected, so it is difficult Identify the monomer information transmitted by the chopping signal; in this case, the existing electric energy meter cannot effectively detect the occurrence of power line chopping, let alone identify (analyze) the monomer information carried by the chopping signal;
[0005] 2) It is applied to the power line chopping stealing power that affects the metering system of the electric energy meter. The metering of the electric energy meter is mainly calculated by the voltage AD sampling and current AD sampling of the metering unit to calculate the power consumption of the user, but some criminals use The special stealing method chops the voltage sampling signal of the meter from the input terminal, destroying the integrity of the signal, resulting in the effective value of the voltage actually sampled by the meter being smaller than the effective value of the voltage actually applied by the user, thereby achieving the purpose of stealing electricity. This kind of power stealing method is called power line chopping power stealing;
[0006] In addition, the energy meter sampling cannot obtain the effective value of the voltage vector in the application of the actual user, which is seriously affected in the process of calculating the electric energy. The chopper is connected to the electric energy meter verification equipment, and the accuracy verification of the electric energy meter is performed on the accuracy verification equipment. , the real-time accuracy error of the electric energy meter (between the standard verification equipment) will change with the change of the chopping angle of the voltage sampling signal of the electric energy meter by the chopper, resulting in the error of the electric energy meter relative to the standard verification equipment exceeding the measurement of the electric energy meter range of accuracy requirements

Method used

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  • Chopping signal verification method, system and electric energy detection device
  • Chopping signal verification method, system and electric energy detection device
  • Chopping signal verification method, system and electric energy detection device

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 Shown, a kind of chopper signal verification method, this method comprises the following steps:

[0039] S01: Sampling the power signal in real time, and performing waveform recovery processing on the sampled signal to obtain the restored sampled signal;

[0040] Arrange the voltages of each sampling point according to the time sequence and perform fitting processing to obtain the restored sampling signal.

[0041] S02: Perform an integrity analysis on the restored sampling signal, and determine whether the restored sampling signal is in a chopping state;

[0042] Judging whether the restored sampling signal is complete and whether there is a waveform mutation, and judging that the sampling waveform is in a chopping state according to the absence of the restored sampling signal or the waveform mutation. Specifically: perform differential operations on each sampling point on the restored sampling signal and use the second-order difference algorithm to ...

Embodiment 2

[0052] A chopping signal verification system, the system includes a sampling and waveform restoration unit, a waveform analysis unit, a chopping type determination unit and a chopping processing unit; wherein, the sampling and waveform restoration unit, the waveform analysis unit, the chopping type determination unit and The chopping processing units are connected in sequence; wherein,

[0053] The sampling and waveform restoration unit samples the power signal in real time, and performs waveform restoration processing on the sampled signal to obtain the restored sampled signal;

[0054] The waveform analysis unit performs integrity analysis on the restored sampling signal, and judges whether the restored sampling signal is in a chopping state;

[0055] The chopping type judging unit judges the chopping type according to the chopping state of the restored sampling signal;

[0056] The chopping processing unit performs information analysis or validity processing on the restore...

Embodiment 3

[0058] This embodiment provides an electric energy meter, which includes the chopping signal verification device in the second embodiment.

[0059] Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

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Abstract

The invention discloses a chopping signal calibration method and system and an electric energy detecting device. The method comprises the following steps: carrying out real-time sampling on a power signal and carrying out waveform recovery on the sampling signal; carrying out an integrity analysis on the restored sampling signal and determining whether the sampling signal is in a chopping state; determining a chopping type according to the chopping state of the sampling signal; and on the basis of the chopping type, information analysis or validity processing is carried out on the sampling signal. According to the invention, the chopping signal is monitored in real time and the information analysis or validity processing is carried out on the sampling signal, so that the information carried by the chopping communication is acquired in time, the measurement accuracy of the electric energy device is ensured, and the basic interests of the electric power station are guaranteed.

Description

technical field [0001] The invention relates to chopping processing technology, in particular to a chopping signal verification method, system and electric energy detection device. Background technique [0002] The power line chopping signal is divided into DC chopping and AC chopping. It is a signal processing method that performs partial signal chopping (or irregular angle chopping of sine and cosine signals) on the power line signal by means of thyristors and auxiliary control circuits. . [0003] The application of power line chopping signal in the field of electric energy meter is divided into two types: [0004] 1) The application of a special signal communication on the power line through a small-angle chopping signal. Due to the characteristics of the small chopping angle and the power grid signal of the power line itself being easily interfered, the power line chopping communication signal is difficult to be detected, so it is difficult Identify the monomer inform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R11/24G01R35/04
CPCG01R11/24G01R35/04
Inventor 高建余海林
Owner HEXING ELECTRICAL